garagelu

So I am a little confused on the descriptions online for mattresses. The advertised prices on say target, sears, etc....do they include just the mattress or both mattress and box spring. I don't see any box springs being sold separately so am I right assuming they sell these as a set?

Say you need to check part thickness in a brake rotor. You will have to check 40-50 of these rotors. If I was already using a 0-6" micrometer and swtiched to a 0-1" micrometer, do you think that the measurement accuracy would increase. Keep in mind these rotors are about .8" thick.

Can you guys think of anything that could go wrong using a 0-6" micrometer to measure a part that is only .8 inches thick?

Would the measurement variation be better using a smaller range micrometer?

I need to know the xbar symbol to type into excel. This is the symbol x with the bar over it, also known as the mean of x.

I need some help with excel. I am trying to find the function where if I add a new data set into excel, it will auto calculate with the formula already provided.

So for example

Jan Feb Mar

12 13 11

3 4 6

7.5 8.5 8.5 average

So I want to be able to add the rest of the months, input the numbers and have excel auto calculate the averages with me even touching anything.

I am in the process of getting my brembo sti calipers repainted. I do NOT want to powdercoat it. This is because the brembo gold color probably cant be color matched very easily.

So this is what I am thinking of doing and I want to see what other people think. Especially people who have race experience with brakes.

I want to strip down the paint first of course. Then prep it for paint. I want to first spray the calipers with a few coats of some kind of high temp paint. Maybe some kind of header or exhaust heat resistant paint. Then spray an automotive paint over it and then clear coat it.

Do you guys think the base heat resistant paint will protect that automotive paint? Most heat resistant paint is ceramic based. And does anyone brembo's method and process when painting thier brakes. What materials do they use?

I have looked all over the internet and material websites looking for this.

I need the yield strength, ultimate tensile strength, ductility, modulus of elasticity, and toughness numbers for 1075 tool steel. Any number you have would be helpful.

I have been looking at every website possible for the numbers on 6061-T6 aluminum.

I am needing the modulus of elasticity and toughness numbers at temperatures, 100, 150, 205, 260, 315, 370 degrees celcius. Also is there a way to get those numbers through an equation using other property numbers.

Any numbers you have available, please help.

A 2.500 inch thick 7050-T7651 Aluiminum alloy is being evaluated for use as a pressure vessel. Analysis has determined that the max flaw size present in this material is 0.10 inches. What is the maximum stress that this material can withstand before a flaw would grow? Do not apply a factor of safety to calculation and use a worst case scenario.

Does anyone know how to do this or the formula for max allowable stress of a pressure vessel.

Perform the appropriate hypothesis test or regression analysis as required.

Data from two cookie making processes were collected. The value's units are grams. The purpose was to determine if the two processes are producing cookies of the same weight. Past cookie data make it plausible to consider cookie weight is normally distributed. Perform the appropriate test to answer the question, "Is there a difference at 95% confidence?"

Machine A Data: 11.5 11.7 11.8 11.7 11.9 11.8 11.3 11.8 11.4 11.7

Machine B Data: 11.7 11.5 11.9 11.6 12.0 12.1 12.0 12.0 11.9 11.9

I am in Design of Experiments class and our assignment is to design a exp to see if the coasting speed of a bicycle is related to tire pressure. We need to test with different tire pressures and find the time over distance. Obviously there is a relation....but we need to set up a correlation coefficient for it. In the write up, we have to be able to guard the validity of the experiment and test the reliability of the experiment. And we also need to set up a scatter plot of the data.

Can someone tell me how to set this experiement up and what do I do with the results? The teacher I have is not very clear.

If I wanted to design an experiement that tested 2 different fishing poles, and wanted to see which one cast the furthest, how would I design it so all the errors were minimized or eliminated?

Here is what I came up with so far...

to do the exp where there are no wind conditions

to cast onto a surface where it will not bounce

to automate some kind of arm to take out the human element

what others are there? How could I come up with a randomized order? And how do I verify the response? And how do I design it so it can be reproduced?

I want to know what people think. I couldn't get any of my friends to go to this weekends Tigers vs Yankees game. So I just bought one ticket for myself. I really wanted to see the Yankees play. Would I look silly or retarded going to the game myself?

I painted my deck in two different sections and on two different day. I think the first day I didnt stir the stain enough and the second section of my deck is a different color. I tried removing the stain but only got some of it off. Can I get a darker stain to cover it? Or will it show through? Any suggestions?

A metal tank with a capacity of 1700 L is completely filled with ethanol when both the tank and the ethanol are at temperature 19.0 C. Then the tank and its contents are brought underground, where the temperature is 10.0 C . What volume of air will there be above the ethanol in the tank after the system has cooled off to the ground temperature? The coefficient of volume expansion for ethanol is = 7.50×10^−4 K^-1 . The tank is made of a metal for which the coefficient of linear expansion is = 1.20×10^−5 K^-1.

A) Find the change in volume of the metal tank,delta v sub t , and that of the ethanol in it, delta v sub e. Express your answers in liters separated by a comma.

B) What volume of air will there be above the ethanol in the tank after the system has cooled off to the ground temperature?

Express your answer in liters.

A crate of fruit with a mass of 37.5 kg and a specific heat capacity of 3650 J/(kg *K) slides 7.70 m down a ramp inclined at an angle of 36.2 degrees below the horizontal.

A) If the crate was at rest at the top of the incline and has a speed of 2.50 m/s at the bottom, how much work W_f was done on the crate by friction?

A Carnot heat engine uses a hot reservoir consisting of a large amount of boiling water and a cold reservoir consisting of a large tub of ice and water. In 5 minutes of operation of the engine, the heat rejected by the engine melts a mass of ice equal to 4.25×10^−2 kg.

Throughout this problem use Lsub f=3.34 * 10^5 J/kg for the heat of fusion for water.

A) During this time, how much work W is performed by the engine?

A cylinder contains 0.250 mol of carbon dioxide gas at a temperature of 27.0 C. The cylinder is provided with a frictionless piston, which maintains a constant pressure of 1.00 atm on the gas. The gas is heated until its temperature increases to 127.0 C. Assume that the CO_2 may be treated as an ideal gas.

A) How much work W is done by the gas in this process?

B) What is the change in internal energy Delta U of the gas?

C) How much heat Q was supplied to the gas?

You push with a horizontal force of 38.7 N against a 19.0 N box, pressing it against a rough wall to hold it in place. The coefficients of kinetic and static friction between this box and the wall are 0.300 and 0.600, respectively.

A) What is the friction force on the box?

B) How hard would you have to press for the box to slide downward with a uniform speed of 8.50 cm/s?

Two forces, of magnitudes F_1 = 80.0 N and F_2 = 30.0 N, act in opposite directions on a block, which sits atop a frictionless surface, as shown in the figure. Initially, the center of the block is at position x_i = -2.00 cm. At some later time, the block has moved to the right, and its center is at a new position, x_f = 1.00 cm.

A) Find the work W_1 done on the block by the force of magnitude F_1 = 80.0 N as the block moves from x_i = -2.00 cm to x_f = 1.00 cm.

B) Find the work W_2 done by the force of magnitude F_2 = 30.0 N as the block moves from x_i = -2.00 cm to x_f = 1.00 cm.

C) What is the net work done on the block by the two forces?

D) Determine the change K f - K i in the kinetic energy of the block as it moves from x_i = -1.00 cm to x_f = 1.00 cm.

An object of mass M = 5.00 kg is attached to a spring with spring constant k = 55.0 N/m whose unstretched length is L = 0.200 m, and whose far end is fixed to a shaft that is rotating with an angular speed of omega = 1.00 radians/s. Neglect gravity and assume that the mass also rotates with an angular speed of 1.00 radians/s.

Given the angular speed of omega = 1.00 radians/s, find the radius R(omega) at which the mass rotates without moving toward or away from the origin.

Awnser is in meters....